A car of mass m = 1100 kg, moving with a velocity of 22.0 m/s, skidded off the road hitting a tree that brought the car to rest in 2.0 s. Determine
(a) the impulse J imparted to the tree.
(b) the average force that acted on the tree during collision.
a) Impulse is defined as a change in momentum (occur due to collision)
Here = 0, and = 22.0 m/s, and m = 1100 kg
So the impulse J= -1100*22= - 24200 kg m/s
Impulse is a vector, so a negative impulse means the net force is in the negative direction.
b) Also, impulse can be defined as
So average force
= 12100 N
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